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2.0.4

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chudov
2009-06-24 19:40:23 +00:00
parent 7f27f99406
commit b6c12bda14
28 changed files with 6280 additions and 5910 deletions
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18
CUETools.AccurateRip/AccurateRip.cs
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@@ -23,6 +23,24 @@ namespace CUETools.AccurateRip
Init();
}
/*
Like in the slow function, the outer loop enumerates samples, and the inner loops enumerate offsets.
I move the IF's out of the innter loop by breaking up offsets into three categories.
First range of offsets are those offsets, which can move our current sample into previous track.
Second range of offsets are those offsets, which don't move our current sample out of current track.
And the third range of offsets are those offsets, which move our current sample into next track.
The first boundary is the (positive) distance from the track start to the current sample. E.G. the 13th sample of a track (currentOffset + si == 13) will be moved into previous track by any offset > 13, and will stay in the current track when offset is <= 13.
The second boundary is the (negative) distance from the next track start to the current sample. (trackLength - (currentOffset + si)).
I use Max/Min functions to make sure the boundaries don't leave the offset range that i'm using.
For each range i calculate baseSum, which is an AR CRC of the current sample, using the last offset in this range.
All the other CRC's in this offset range are calculated by consequently adding sampleValue to the previous sum.
*/
unsafe private void CalculateAccurateRipCRCsSemifast(int* samples, uint count, int iTrack, uint currentOffset, uint previousOffset, uint trackLength)
{
fixed (uint* CRCsA = &_offsetedCRC[Math.Max(0, iTrack - 1), 0],